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Method for comparison of tokamak divertor strike point data with magnetic perturbation models

P. Cahyna, M. Peterka, E. Nardon, H. Frerichs, R. Panek2014年被引用 8Nuclear FusionIF 3出版社

Resonant magnetic perturbations (RMPs) used to control type-I edge-localized modes produce a splitting of the peaks of heat flux profile on the divertor. The additional peaks can appear outside the areas connected to the plasma core by the perturbed field lines due to perpendicular transport. This effect has been studied so far using demanding three-dimensional transport simulations. We present a simple method to quantitatively estimate the heat flux profile that the RMP will produce on the divertor. The method needs only field line tracing to determine the so-called tangle distance function, and knowledge of the heat flux profile on the unperturbed heat flux profile. We find good agreement between this method and a transport simulation.

日本語訳

共鳴磁場摂動(RMP)は、I型周辺局在モードを制御するために用いられ、ダイバータ上の熱流束分布のピークの分裂を生じさせる。追加のピークは、垂直輸送により、摂動磁力線によってプラズマに接続された領域の外側に現れることがある。この効果はこれまで、要求の厳しい三次元輸送シミュレーションを用いて研究されてきた。我々は、RMPがダイバータ上に生じさせる熱流束分布を定量的に推定する簡便な方法を提示する。この方法は、いわゆるタングル距離関数を決定するための磁力線追跡と、非摂動熱流束分布に関する知識のみを必要とする。我々は、この方法と輸送シミュレーションの間に良好な一致を見出す。

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